■
■
The following applies to all setting procedures:
• If no button is pressed for 15 s during the setting procedure, the
unit returns to the operating mode with the parameter values
unchanged.
• If adjustment has not been possible, all the red LEDs flash. The unit
returns to the operating mode with the parameter values
unchanged.
■
■
Locking / Unlocking
The unit can be electronically locked to prevent unwanted adjustment
of the set parameters: Press both setting buttons for 10 s (the unit
must be in Run mode). Indication goes out briefly (acknowledgement
of locking / unlocking).
Units are delivered from the factory in the unlocked state.
If the unit is locked, it is possible to indicate
• the current switch point 1 (press the Mode/Enter button once),
• the current switch point 2 (press the Mode/Enter button two times),
• the setting of the function “monitoring excess flow” (press the
Mode/Enter button three times).
After mounting, wiring and setting check whether the unit operates
correctly.
When the supply voltage is applied, all LEDs light and go off one after
the other.* The unit is then ready for operation.
*During this time both outputs are switched according to the programming:
ON with the NO function and OFF with the NC function.
Failure indication
:
5
left
LED’s flashing in case of short-circuit at the output
S1
; 5
right
LED’s flashing in case of short-circuit at the output
S2
.
Recommended maintenance
Check the sensor tip for build-up from time to time. Clean it with a
soft cloth. If necessary, build-up which adheres firmly (e.g. lime) can
be removed with a common vinegar cleansing agent.
26
Installation and set-up / Operation / Maintenance
